It's about time that Jackson went to get his neck lacerations checked out by a professional. Ever since Derek took a chunk out of his flesh, Jack's been hallucinating, having terrible nightmares and even once--depending on your interpretation--something otherworldly crawled out of his mouth.

In this sneak peek of Monday's all-new episode, the "Teen Wolf" stud finally heads into the examination room. The doc can't seem to find tools big enough to dig around (we're sorry, but what insurance plan is Jackson on that his physician is using the medical equivalent of gardening sheers to inspect his wound?), but finally manages to grab hold of the bloody whatever-it-is that's lodged inside his neck. (Scream!)